Printing head

Details Printing head Printing head

1977-07-14

1979-01-16

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, B41J 312

Patent

active

041346912

ABSTRACT:
A printing head for dot matrix printers, including novel electromagnet structures for driving individual printing wires. In each electromagnet, a pair of coils generally radial to the printing wire axis drive an armature coaxial with the printing wire and to which it is attached. The head is specifically designed for simple and reliable construction at low cost, operation at moderate speeds (60-100 cps) for extended periods with a long, powerful stroke, and includes high-reliability mounting elements for the print wire and armature, where problems have been experienced with prior art designs.

REFERENCES:
patent: 3335659 (1967-08-01), Schacht et al.
patent: 3467232 (1969-09-01), Paige
patent: 3842737 (1974-10-01), Gomi
patent: 3842955 (1974-10-01), Iwasaki
patent: 3897865 (1975-08-01), Darwin et al.
patent: 3994381 (1976-11-01), Hebert

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